3.8.4: a grey boot splash with a crisp logo, graphite grey ARM wallpaper

the pi splash is now neutral grey, no terracotta anywhere
the tree mark is drawn from the full 160 px art, so it is sharp, not a smudge
the bar under it is a calm grey
new arm64-splash-check.py in the ci suite; quietboot and crash checks follow the grey

Boot it

The release above includes joshuatree-3.8.4.iso, a bootable disk image. Write it to a USB stick to boot on real hardware:

macOS:

diskutil list                    # find the disk (e.g. disk2)
sudo dd if=joshuatree-3.8.4.iso of=/dev/rdiskN bs=4m

Linux:

lsblk                            # find the device (e.g. sdb)
sudo dd if=joshuatree-3.8.4.iso of=/dev/sdX bs=4M status=progress conv=fsync

This will erase the stick. Double-check the device path first. Boot the machine from the USB stick (F12/F10/Esc/Del at power-on for most PCs) to start the kernel.

The ISO is proven to boot in QEMU (CD-ROM and USB-style raw disk) via the CI regression suite. Real hardware testing is ongoing.